I'd be happy with just being able to do regex searches over multiple (2 or 3) lines without jumping through hoops. The mentioned Structural Search for JetBrains' IDE sounds promising--I'll have to try that out.
[1] https://www.jetbrains.com/idea/docs/ssr.pdf [2] https://www.youtube.com/watch?v=YeGPO-UHTbs [3] https://www.jetbrains.com/help/idea/structural-search-and-re... [4] https://www.jetbrains.com/help/go/structural-search-and-repl... [5] https://www.jetbrains.com/help/pycharm/structural-search-and...